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Physical Chemistry
A process involves the performance of electrical work in the amount w' on a system. Show that if the process is carried out at constant volume, the heat absorbed is deltaH-w'.
Physical Chemistry
f the volume of ocean water is 4.18*10^20L contains 4.3 percent sodium chloride ("salt") by mass and the density of the water is 1.56 g/mL, calculate the total mass of sodium chloride. (1 ton = 2000 lb, 1 lb = 453.6 g)
Physical Chemistry
Calculate the cell potential of the following cell at 298K.
Zn(s)|Zn^2+(0.6 M)||Cu^2+(0.3 M)|Cu(s)
E0 (Zn^2+| Zn) = -0.76 volt, E0(Cu^2+ |Cu) =0.34 volt.
Zn(s)|Zn^2+(0.6 M)||Cu^2+(0.3 M)|Cu(s)
E0 (Zn^2+| Zn) = -0.76 volt, E0(Cu^2+ |Cu) =0.34 volt.
Physical Chemistry
I am using Cr (Chromium) metal, which forms Cr3+ ions when dissolved. If 0.134 g of the metal dissolve, how moles of electrons passed through the circuit?
Physical Chemistry
How many moles of zinc are there in 0.172 grams of the metal?
Physical Chemistry
Calculate the change in entropy when argon at 25 degree Celcius and 1.00 bar in a container of volume 0.500 dm^3 is compressed to 0.500 dm^3 and cooled to 25 degree Celcius.
Physical Chemistry
mgco3 plus 2hcl plus mgcl2 plus h2 h20 plus co2 if 10 games of c02 is produced calculate the mass of magnesium and hydrochloric acid reacts whats the answer
Physical Chemistry
Given that 1mi=1760yd, determine what conversion factor is appropriate to convert 1849yd to miles; to convert 2,781mi to yards.
Physical Chemistry
What characterizes in general a basic solution is the presence of hydroxide ions, when adding a base to the water, the base B takes from the water molecule a proton H+, thus obtaining BH+ and OH-
B + H2O → BH+ +OH-
The same thing occurs with NH3: NH3 + H2O → NH4+ +OH-
but with NaOH it's different, we don't represent the water molecule in the equation, we just write:
NaOH → Na+ +OH-
What is the role of the water in this case, I know there's a phenomen of dilution, but there must be a proton exchange?
Thank you
B + H2O → BH+ +OH-
The same thing occurs with NH3: NH3 + H2O → NH4+ +OH-
but with NaOH it's different, we don't represent the water molecule in the equation, we just write:
NaOH → Na+ +OH-
What is the role of the water in this case, I know there's a phenomen of dilution, but there must be a proton exchange?
Thank you
Physical Chemistry
I am working on a small project on my own, and need some information. I need to know of a solvent that will be used in a formula. It will allow the formula to remain thixotropic gel or liquid. It should be easy to evaporate and bot too easy to combust.
